Validating device



FIG. 1 is a front perspective view of a validating device of my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is top plan view thereof.

The bottom view of the device forms no part of the claimed design. The broken lines depict elements that are environment, such elements form no part of the claimed design. 

CLAIM The ornamental design for a validating device, as shown and described. 